Xdebug

The Xdebug extension helps you debugging your script by providing a lot of valuable debug information. The debug information that Xdebug can provide include the following:

1. Stack traces and function traces in error messages with

a. Full parameter display for user defined functions

b. Function name, file name and line indications

c. Support for member functions

2. Memory allocation

3. Protection for infinite recursions

Platform: PEAR version 0.9.1-dev or higher and some UNIX; Code license: The Xdebug License

Reference: https://xdebug.org/

apd

apd is a full-featured profiler/debugger that is loaded as a zend_extension. It aims to be an analog of C's gprof or Perl's Devel::DProf.

Platform: Cross-plarform; Code license: PHP License

Reference: https://pecl.php.net/package/apd

DBG

DBG is a a full-featured PHP debugger, an interactive tool that helps you debugging php scripts. It works on a production and/or development WEB server and allows you debug your scripts locally or remotely, from an IDE or console.

Platform: Cross-platform; License: OSI-Approved Open Source

Reference: https://sourceforge.net/projects/dbg2/

Expert Debugger

Expert Debugger is a free easy-to-use tool for debugging PHP scripts. Expert Debugger uses the DBG PHP Debugger and allow to debug scripts via network or on local computer. You can run scripts in step-by-step mode and to trace values of any variables and script output. The debugger has a comfortable interface and can be integrated with IDE or editors.

Platform: Windows; License: Freeware

Reference: https://www.skycn.com/soft/36356.html

Gubed

Gubed PHP Debugger is a program to debug PHP scripts.It currently supports stepping through code, watching contents of variables and setting breakpoints (line and conditional). No changes are needed to server software or scripts being debugged.

Platform: Cross-platform; License: GNU General Public License

Reference: https://sourceforge.net/projects/gubed/

Maguma Studio

Maguma Studio is the source-level IDE, equipped with all the features known from other languages' development environments.Through tight integration of the PHP interpreter and the PHP documentation, Maguma Studio gives developers a time-saving development tool. Features full integration of the PHP interpreter and the PHP documentation (through "function insight" and F1-key popup manual pages), integrated preview window, full syntax highlighting for HTML and PHP, Auto Complete for frequently used text constructs, tag buttons and all the standard editing functions like almost unlimited undo, copy and paste, searching, etc. Studio is smaller and faster loading than other PHP IDEs.

Platform: Windows; License: Freeware

Reference: https://www.maguma.com/maguma-studio.html

SEG

SEG is a text editor designed mostly for PHP scripting but may be used for lot more. Its features include:

1. Highlighters for HTML, PHP, CSS, JavaScript, VBScript, SQL, Java, C#, C++, Delphi, x86 Assembly, MS-DOS Batch, Perl, Tcl/Tk, Borland Form Files

2. User Menu whitch may be used for making templates, testing scripts etc.

3. Other useful features...

Platform: Windows; License: Unspecified

Reference: https://gonix.ten.lt/

Light PHP Edit

PHP editor, made to be light, easy and simple,

integrated with PHP by php4delphi component,

Highlight by SynEdit component,

Debuging XDebug.org DBGp protocol,

has internal console for learning php easy, Run, Check, Breakpoints and Watches.

Platform: Windows; License: GNU General Public License

Reference: https://www.parmaja.com/projects/LightPHPEdit/

Arisesoft Winsyntax

Arisesoft Winsyntax - is a PHP-code editor, with the syntax highlighting and the context help for professional scripting.

Platform: Windows; License: Freeware

Reference: https://www.winsyntax.com/

RSPE-Real Simple PHP Editor

RSPE is a Simple IDE for developing and editing PHP. RSPE comes with a database of premade script examples, tutorials, and some code snipits.

Platform: Windows; License: GNU General Public License

Reference: https://sourceforge.net/projects/rspe/

HTML-Kit

HTML Kit is a full-featured editor for HTML, XHTML, XML, CSS, JavaScript, PHP and other text files. HTML Tidy for creating standards-compliant web pagesis one of hundreds of plugins available for it.

Platform: Windows; License: https://www.htmlkit.com/license/

Reference:https://www.chami.com/html-kit/

Scintilla

Scintilla is a free source code editing component which includes useful features such as syntax styling, error indicators, folding, code completion and call tips. The project includes SciTE (SCIntilla based Text Editor).

Platform: Cross platform; License: License for Scintilla and SciTE

Reference:https://sourceforge.net/projects/scintilla/

FTE

FTE is a free text editor for developers. It is really powerful, yet very easy and intuitive to use.

Ports that can be compiled from the current source tree include OS/2, Win32 console, DOS, Linux console and an X port for many UNIX'es, including Linux, AIX, Solaris, HP, and Cygwin. An incomplete UNIX terminal port (using s-lang) is also available.

Platform: Cross-platform; License: GNU GPL

Reference:https://fte.sourceforge.net/